my website was ranking top one for certain keywords for the past five years in google.
but my website ranking in Google has been hacked about two weeks from the middle of this month,
two weeks ago, my website was suddenly disappear from the Google search results and then I have changed my website hosting to another new hosting company about four days ago, but today I have found that the title and description on the search results have been replaced to different one which are totally unrelated to my website.
I have checked my web page source code which does not changed, only the search result has been changed.

I have checked my website ranking in other search engines such as Yahoo and bing, and the ranking is still top one and the title and description are all correct.
I think the hack for my website ranking is specific to Google.

i have used dedicated IP for my website before this hacking occure and now I have changed my website to shared IP with new hosting about 4 days ago....